LocalScript not running in an actual game?

[Ultimax_84 (イカルド・トルテリーニ)]

this is kind of a sequel to my last post: LocalScript exclusively prints “nil”? - Help and Feedback / Scripting Support - Developer Forum | Roblox

the script works fine inside of Roblox Studio, which can be seen here:

but inside of an actual game, it seems to only work about half of the time. what could i possibly be doing wrong?

[Katrist]

If you have a problem with the main post, just reply to it. It only makes it more confusing for people to search for another post.

That being said, check the main post.